first implementation

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in omniauth-tqq-oauth2.gemspec
+gemspec

LICENSE

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+Copyright (c) 2012 cqpx
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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-omniauth-tqq-oauth2
-===================
+# Omniauth::Tqq::Oauth2
 
-omniauth-tqq-oauth2
+TODO: Write a gem description
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+    gem 'omniauth-tqq-oauth2'
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install omniauth-tqq-oauth2
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Contributing
+
+1. Fork it
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Added some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create new Pull Request

Rakefile

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+#!/usr/bin/env rake
+require "bundler/gem_tasks"

lib/omniauth-tqq-oauth2.rb

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+require "omniauth-tqq-oauth2/version"
+require 'omniauth/strategies/tqq'

lib/omniauth-tqq-oauth2/version.rb

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+module Omniauth
+  module Tqq
+    module Oauth2
+      VERSION = "0.0.1"
+    end
+  end
+end

lib/omniauth/strategies/tqq.rb

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+require 'omniauth-oauth2'
+
+module OmniAuth
+  module Strategies
+    class Tqq < OmniAuth::Strategies::OAuth2
+      # Give your strategy a name.
+      option :name, "tqq"
+
+      # This is where you pass the options you would pass when
+      # initializing your consumer from the OAuth gem.
+      option :client_options, {
+        :site           => "https://open.t.qq.com",
+        :authorize_url  => "/cgi-bin/oauth2/authorize",
+        :token_url      => "/cgi-bin/oauth2/access_token"
+      }
+      option :token_params, {
+        :parse          => :query
+      }
+
+      # These are called after authentication has succeeded. If
+      # possible, you should try to set the UID without making
+      # additional calls (if the user id is returned with the token
+      # or as a URI parameter). This may not be possible with all
+      # providers.
+      uid {
+        access_token["openid"]
+      }
+
+      info do
+        {
+          :name => raw_info['name'],
+          :email => raw_info['email']
+        }
+      end
+
+      extra do
+        {
+          'raw_info' => raw_info
+        }
+      end
+
+      credentials do
+        hash = {'token' => access_token.token}
+        hash.merge!('openid' => @openid) if @openid
+        hash.merge!('openkey' => @openkey) if @openkey
+        hash.merge!('refresh_token' => access_token.refresh_token) if access_token.expires? && access_token.refresh_token
+        hash.merge!('expires_at' => access_token.expires_at) if access_token.expires?
+        hash.merge!('expires' => access_token.expires?)
+        hash
+      end
+
+      def build_access_token
+        verifier = request.params['code']
+        @ac_token ||= client.auth_code.get_token(verifier, {:redirect_uri => callback_url}.merge(token_params.to_hash(:symbolize_keys => true)))
+      end
+
+      def callback_phase
+        if request.params['error'] || request.params['error_reason']
+          raise CallbackError.new(request.params['error'], request.params['error_description'] || request.params['error_reason'], request.params['error_uri'])
+        end
+
+        self.access_token = build_access_token
+        self.access_token = access_token.refresh! if access_token.expired?
+        @openid = request.params["openid"]
+        @openkey = request.params["openkey"]
+
+        super
+      rescue ::OAuth2::Error, CallbackError => e
+        fail!(:invalid_credentials, e)
+      rescue ::MultiJson::DecodeError => e
+        fail!(:invalid_response, e)
+      rescue ::Timeout::Error, ::Errno::ETIMEDOUT => e
+        fail!(:timeout, e)
+      rescue ::SocketError => e
+        fail!(:failed_to_connect, e)
+      end
+
+      def raw_info
+        @raw_info ||= access_token.get("/api/user/info", params: {
+          openid: @openid,
+          oauth_consumer_key: access_token.client.id,
+          access_token: access_token.token,
+          oauth_version: '2.a'
+        }, parse: :json).parsed
+      end
+    end
+  end
+end

omniauth-tqq-oauth2.gemspec

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+# -*- encoding: utf-8 -*-
+require File.expand_path('../lib/omniauth-tqq-oauth2/version', __FILE__)
+
+Gem::Specification.new do |gem|
+  gem.authors       = ["cqpx"]
+  gem.email         = ["[email protected]"]
+  gem.description   = %q{OmniAuth Oauth2 strategy for t.qq.com.}
+  gem.summary       = %q{OmniAuth Oauth2 strategy for t.qq.com.}
+  gem.homepage      = ""
+
+  gem.files         = `git ls-files`.split($\)
+  gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
+  gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
+  gem.name          = "omniauth-tqq-oauth2"
+  gem.require_paths = ["lib"]
+  gem.version       = Omniauth::Tqq::Oauth2::VERSION
+
+  gem.add_dependency 'omniauth', '~> 1.0'
+  gem.add_dependency 'omniauth-oauth2', '~> 1.0'
+end